当我单击 listItem 时，我尝试调用使用当前活动数据的其他活动。但我的代码中有错误。如何解决？
第 105 行：
SQLiteCursor cr=(SQLiteCursor)parent.getItemAtPosition(position);
ListAnSco.java
public class ListAnSco extends SherlockActivity{
protected EditText searchText;
DatabaseHelper dbhelper;
SQLiteDatabase db;
protected Cursor cursor;
ListAdapterAnSco adapter;
private static ListView liste;
TextView ansco;
String [] from;
int to[];
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.annee_sco_list);
setTitle(R.string.titre_list_ansco);
searchText = (EditText) findViewById(R.id.searchText_ansco);
liste = (ListView) findViewById(R.id.list_ansco);
ansco = (TextView) findViewById(R.id.label_ansco);
try {
LoadListAnsco();
} catch (Exception e) {
Toast.makeText(this, "Impossible d'afficher \n"+e.toString(), Toast.LENGTH_SHORT).show();
}
liste.setOnItemLongClickListener(new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View v, int position,
long id) {
try
{
SQLiteCursor cr=(SQLiteCursor)parent.getItemAtPosition(position);
String ansco=cr.getString(cr.getColumnIndex(DatabaseHelper.ANSCO));
AnSco an=new AnSco(ansco);
an.setIdan((int)id);
AlertDialog diag= Alerts.ShowEditDialogAnSco(ListAnSco.this,an);
diag.setOnDismissListener(new OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), R.string.notif_annuler, Toast.LENGTH_SHORT).show();
//((SimpleCursorAdapter)grid.getAdapter()).notifyDataSetChanged();
LoadListAnsco();
}
});
diag.show();
cr.close();
}
catch(Exception ex)
{
Alerts.CatchError(ListAnSco.this, ex.toString());
}
return false;
}
});
liste.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v, int position,
long id) {
Intent intent = new Intent(getApplicationContext(),ListPeriode.class);
SQLiteCursor cr=(SQLiteCursor)parent.getItemAtPosition(position);
String ansco=cr.getString(cr.getColumnIndex(DatabaseHelper.ANSCO));
AnSco an=new AnSco(ansco);
an.setIdan((int)id);
Toast.makeText(getApplicationContext(), "Année Scolaire: "+an.getAnsco(), Toast.LENGTH_LONG).show();
intent.putExtra("ANSCO_ID", an.getIdan());
intent.putExtra("ANSCO_AN", an.getAnsco());
cr.close();
startActivity(intent);
finish();
}
});
}
public void LoadListAnsco() {
dbhelper = new DatabaseHelper(this);
boolean ok = true;
try {
db = dbhelper.getWritableDatabase();
adapter = new ListAdapterAnSco(this, dbhelper.getLabelsAnSco());
liste.setAdapter(adapter);
Log.i("ListAnsco 3", "OK");
} catch (Exception ex) {
ok = false;
AlertDialog.Builder b = new AlertDialog.Builder(this);
b.setMessage(ex.toString());
b.show();
} finally {
if (ok) {
dbhelper.close();
db.close();
}
}
}
ListAdapterAnSco.java
public class ListAdapterAnSco extends BaseAdapter {
// Declare Variables
Context mContext;
LayoutInflater inflater;
private List<AnSco> listAnsco = null;
private ArrayList<AnSco> arraylist;
public ListAdapterAnSco(Context context, List<AnSco> listAnsco) {
mContext = context;
this.listAnsco = listAnsco;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<AnSco>();
this.arraylist.addAll(listAnsco);
}
public class ViewHolder {
TextView an;;
}
@Override
public int getCount() {
return listAnsco.size();
}
@Override
public AnSco getItem(int position) {
return listAnsco.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.annee_sco_item, null);
// Locate the TextViews in listview_item.xml
holder.an = (TextView) view.findViewById(R.id.ansco_item);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Set the results into TextViews
holder.an.setText(listAnsco.get(position).getAnsco());
return view;
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
listAnsco.clear();
if (charText.length() == 0) {
listAnsco.addAll(arraylist);
}
else
{
for (AnSco wp : arraylist)
{
if (wp.getAnsco().toLowerCase(Locale.getDefault()).contains(charText))
{
listAnsco.add(wp);
}
}
}
notifyDataSetChanged();
}
}
AnSco.java
package com.android.moyenne.ansco;
public class AnSco {
int idan;
String ansco;
public AnSco(int idan, String ansco) {
this.idan = idan;
this.ansco = ansco;
}
public AnSco(String ansco) {
this.ansco = ansco;
}
public AnSco() {
// TODO Auto-generated constructor stub
}
public int getIdan() {
return idan;
}
public void setIdan(int idan) {
this.idan = idan;
}
public String getAnsco() {
return ansco;
}
public void setAnsco(String ansco) {
this.ansco = ansco;
}
}
Logcat 异常
10-29 10:57:56.316: E/AndroidRuntime(1554): FATAL EXCEPTION: main
10-29 10:57:56.316: E/AndroidRuntime(1554): java.lang.ClassCastException: com.android.moyenne.ansco.AnSco cannot be cast to android.database.sqlite.SQLiteCursor
10-29 10:57:56.316: E/AndroidRuntime(1554): at com.android.moyenne.ansco.ListAnSco$3.onItemClick(ListAnSco.java:105)
10-29 10:57:56.316: E/AndroidRuntime(1554): at android.widget.AdapterView.performItemClick(AdapterView.java:298)
10-29 10:57:56.316: E/AndroidRuntime(1554): at android.widget.AbsListView.performItemClick(AbsListView.java:1100)
10-29 10:57:56.316: E/AndroidRuntime(1554): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2788)
10-29 10:57:56.316: E/AndroidRuntime(1554): at android.widget.AbsListView$1.run(AbsListView.java:3463)
10-29 10:57:56.316: E/AndroidRuntime(1554): at android.os.Handler.handleCallback(Handler.java:730)
10-29 10:57:56.316: E/AndroidRuntime(1554): at android.os.Handler.dispatchMessage(Handler.java:92)
10-29 10:57:56.316: E/AndroidRuntime(1554): at android.os.Looper.loop(Looper.java:137)
10-29 10:57:56.316: E/AndroidRuntime(1554): at android.app.ActivityThread.main(ActivityThread.java:5103)
10-29 10:57:56.316: E/AndroidRuntime(1554): at java.lang.reflect.Method.invokeNative(Native Method)
10-29 10:57:56.316: E/AndroidRuntime(1554): at java.lang.reflect.Method.invoke(Method.java:525)
10-29 10:57:56.316: E/AndroidRuntime(1554): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
10-29 10:57:56.316: E/AndroidRuntime(1554): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-29 10:57:56.316: E/AndroidRuntime(1554): at dalvik.system.NativeStart.main(Native Method)